I'm in the same boat as you, too many registered on and off-road vehicles to keep track of and once in a while I forget to pay one as well, though I've never heard of this happening before! How long had the registration been over-due would be the only question I have. Had it been just a matter of months? I think I need to go and do a "tag-check" on my fleet today just to be sure the same fate does not befall me. Thanks for the heads-up!